The long-running USA comedy airs its swan song March 26.

Psych is just days away from closing its doors and USA is honoring its eight-season run via an all-night marathon running late Friday through early Saturday.

Stars Dule Hill (Gus) and Kirsten Nelson (Chief Vick) were among the castmembers taking part in the six-hour celebration, "Night of a Million Goodbyes," filming special introductions that aired as part of the marathon. Nelson's message to long-standing fans was perhaps the most emotional of the two. Fighting back tears, the actress voiced her appreciation for the "Psych-Os" who have been there since the beginning in 2006.

Psych's series finale airs March 26 followed by a live aftershow hosted by Kevin Pereira.